<template>
    <h3>考试分类</h3>
    <!-- 表单 -->
    <div class="category-form">
        <div class="opt">
            <!-- 上传文件组件 -->
            <el-upload class="avatar-uploader" drag action="#" :on-change="chooseImageFn" :auto-upload="false"
                :show-file-list="false">
                <img v-if="imageUrl" :src="imageUrl" class="avatar" />
                <el-icon v-else class="avatar-uploader-icon">
                    <Plus />
                </el-icon>
            </el-upload>
            <div v-if="imageUrl" style="width: 178px; text-align: center; margin-top: 5px">
                <el-button @click="photoDeleteFn(imageUrl)" type="danger" plain>删除图片</el-button>
            </div>
        </div>

        <div class="opt">
            <el-input v-model="input" style="width: 360px; height: 44px; font-size: 16px" placeholder="考试分类名称" />
        </div>

        <div class="opt">
            <el-button @click="addCategoryFn" type="primary" size="large">添加考试分类</el-button>
        </div>
    </div>
    <el-divider content-position="left">分类列表</el-divider>

    <!-- 表格 -->
    <div class="category-table">
        <el-table :data="tableData" stripe style="width: 100%">
            <el-table-column prop="index" label="序号" width="90" />
            <el-table-column prop="text" label="分类名称" width="180" />
            <el-table-column label="图标" width="180">
                <template #default="scope">
                    <!-- scope.row.name -->
                    <img style="width: 60px;" v-if="scope.row.icon" :src="scope.row.icon" alt="">
                </template>
            </el-table-column>
            <el-table-column label="操作">
                <template #default="scope">
                    <el-button size="small" type="danger" @click="handleDelete(scope.$index, scope.row)">
                        删除
                    </el-button>
                </template>
            </el-table-column>
        </el-table>
    </div>
</template>


<script setup lang="ts">
import { ref } from 'vue'
import { photoUpload, photoDelete, categoryAdd, categoryList, categoryRemove } from '../../api/request'
import { ElMessage, ElMessageBox } from 'element-plus';
import type { Action } from 'element-plus'
import api from '../../api/index'
const input = ref('')
const imageUrl = ref('')
const pic = ref('')
// 选择图标
const chooseImageFn = async (file: any) => {
    if (file) {
        // 创建表单实例
        let fd = new FormData()
        fd.append('photo', file.raw) // 把图片信息传递给服务器 ，服务器存储好图片，再返回一个图片路径
        // 调用上传图片的方法
        await photoUpload(fd)
            .then(
                content => {
                    console.log("图片路径:",content)
                    let { code, picUrl } = content;
                    if (code == 200) {
                        // 赋值（响应式）
                        imageUrl.value = api.url + picUrl;
                        pic.value = picUrl;
                    }
                    else {
                        ElMessage.error(content.msg);
                    }
                }
            )
    }

}
// 删除图片
const photoDeleteFn = async (picUrl: string) => {
    await photoDelete({ picUrl })
        .then(
            content => {
                // console.log(content);
                let { code } = content;
                if (code == 200) {
                    // 重置图片路径
                    imageUrl.value = "";
                }
            }
        )
}


// 添加考试分类
const addCategoryFn = async () => {
    let text = input.value;
    let icon = pic.value;
    if (text == '' || icon == '') {
        ElMessage.error("缺少参数，请检查再提交");
        return false;
    }
    await categoryAdd({ text, icon })
        .then(
            content => {
                // console.log(content)
                let { code, msg } = content;
                // 添加分类名称成功
                if (code == 200) {
                    ElMessage.success(msg);
                    // 重置表单
                    input.value = "";
                    imageUrl.value = "";
                    pic.value = "";
                    // 重新获取列表
                    getCategoryListFn();
                }
                else {
                    ElMessage.error(msg)
                }
            }
        )
}


// 表格数据
const tableData = ref<any>([])
// 点击删除考试分类
const handleDelete = (index: number, row: any) => {
    // console.log(index, row)
    // 获取当前点击的选项
    let { id, icon, text } = row;
    ElMessageBox.confirm(
        `是否删除这个“${text}”考试分类?`,
        'Confirm',
        {
            distinguishCancelAndClose: true,
            confirmButtonText: '确定',
            cancelButtonText: '取消',
        }
    )
        .then(async () => {
            // console.log("点击确定")
            // 删除考试分类
            await categoryRemove({ id })
                .then(
                    content => {
                        let { code, msg } = content;
                        if (code != 200) {
                            ElMessage.error(msg)
                        }
                    }
                )
            // 删除分类对应的图片
            await photoDelete({ picUrl: icon })
                .then(
                    content => {
                        // console.log(content);
                        let { code, msg } = content;
                        if (code != 200) {
                            ElMessage.error(msg)
                        }
                    }
                )
            // 删除程序中数组对应的数据
            tableData.value.splice(index, 1);
        })
        .catch((action: Action) => {
            // console.log("点击取消")
        })

}
// 定义每一项数据的属性类型
type Item = {
    id: string
    text: string
    icon: string
    index?: string | number
}
// 获取考试分类列表
const getCategoryListFn = async () => {
    await categoryList()
        .then(
            content => {
                // console.log(content)
                let { code, result } = content;
                if (code == 200) {
                    // 整合后台数据
                    let arr = result.map((item: Item, index: number) => {
                        item.index = index + 1;
                        item.icon = api.url + item.icon
                        return item;
                    })
                    tableData.value = arr;
                }
            }
        )
}
getCategoryListFn();


</script>

<style lang="scss">
.category-form {
    .opt {
        margin-top: 15px;
    }

}

.avatar-uploader-icon,
.el-upload-dragger,
.avatar-uploader,
.avatar {
    width: 178px;
    height: 178px;
    display: block;
    padding: 0 !important;
}

.avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    text-align: center;
    padding: 0 !important;
    line-height: 178px;
}
</style>